Liquid,
To answer your questions about Rehabs (Investor's don't really call "rehabs" a "flip")
1. No, rehabing is not simple...by any means. I don't think new investors should pick a rehab as a first deal unless they have a partner/mentor that has a VESTED interest in the deal going well. Working with contractors is never, never, never easy.
2. You don't need a RE liscense to invest in real estate. You will utilize the services of realtor for listing your property (flat fee or full commission listing) or for pulling comps (sales comparables) on a property that you are selling or buying.
Generally, if you have to take possesion of house (actually go to closing on it) and/or have to spend money on rehabbing it, it's not called a flip. To make matters even more confusing, H.U.D, the general public, and real estate investors all have a different definition of flipping. HUD's definition of flipping is illegal...and it should be...it involves fraud and working in concert with appraisers and loan officers to commit fraud.
The show should be called "Rehab this House"